Seiko Cal. 6663 - 856

This Automatic model from 1968 features a 46mm Hardlex-Coated Steel case. It features a Green dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-8ed88ff0d0e7]

Also known as: Sea Horse, Crown

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.7mm

Lug Width

21mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1968

Related Models

• Seiko 0752-864
• Seiko 7121-912
• Seiko 7126-911
• Seiko 6647-482
• Seiko 6699-520
• Seiko 4452-383
• Seiko 3890-422
• Seiko 0799-495
• Seiko 5618-747
• Seiko 0730-910
• Seiko 6287-588
• Seiko 4569-634